A fuses with egg and B is its product. C is the whole mass of zygotes enclosed in thick jelly of frog and Dis the intermediate stage between aquatic and land habitat in frog's life cycle. Identify A, B, C and D.

Explanation

To solve the question, we need to identify the terms A, B, C, and D based on the descriptions provided. Let's break it down step by step:

### Step-by-Step Solution:

1. **Identify A**:
- The question states that "A fuses with egg." In the context of reproduction in frogs, the male gamete that fuses with the female egg is the sperm.
- **Conclusion**: A = Sperm

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